In the game, the player controls the HECU marine Adrian Shepherd through the Black Mesa Research Facility.
One year after Half-Life's release, Gearbox Studios published the first expansion for the game on PC called Half-Life: Opposing Force. In the demo, the player had to establish outside communications by surviving the military and tuning the antenna to the USNRC.ĭuring Half-Life's life cycle, there were three expansions released officially, with one expansion going unreleased. One year after release, Valve released a second demo called Half-Life: Uplink which featured one playable chapter that was cut from the retail game: Uplink. It is also the only demo of the game released before the retail game. In the demo, the player played through the entire game until they complete the first day canonically. Before its release, Valve had released a special downloadable demo for Half-Life called Half-Life: Day One.
